多元热流体注入井筒的热力计算
针对海上油田平台空间小、操作成本高、常规热采实施难度大等问题，进行了多元热流体吞吐技术的研究。以井筒两相流动和传热理论为基础，建立了多元热流体注入井筒过程中流动和换热的数学模型。利用该模型研究了多元热流体在井筒中的流动和换热规律，分析了注入压力、温度对井筒压力、温度、干度的影响和不同比例组成多元热流体对井筒温度的影响。结果表明：在注入过程中，井筒压力取决于重力压降与摩阻压降的大小，井筒温度的升降取决于饱和蒸汽分压的升降；在其他条件不变的情况下，适当降低井口注入压力有利于提高井底温度和井1：7出口干度；注入的氮气和二氧化碳总量不变，氮气比例增大，井底温度下降变快。...
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| Published in | 石油钻采工艺 Vol. 34; no. 5; pp. 61 - 64 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国石油大学,北京,102249%中海油田服务股份有限公司,天津,300452
2012
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-7393 |
Cover
| Summary: | 针对海上油田平台空间小、操作成本高、常规热采实施难度大等问题，进行了多元热流体吞吐技术的研究。以井筒两相流动和传热理论为基础，建立了多元热流体注入井筒过程中流动和换热的数学模型。利用该模型研究了多元热流体在井筒中的流动和换热规律，分析了注入压力、温度对井筒压力、温度、干度的影响和不同比例组成多元热流体对井筒温度的影响。结果表明：在注入过程中，井筒压力取决于重力压降与摩阻压降的大小，井筒温度的升降取决于饱和蒸汽分压的升降；在其他条件不变的情况下，适当降低井口注入压力有利于提高井底温度和井1：7出口干度；注入的氮气和二氧化碳总量不变，氮气比例增大，井底温度下降变快。 |
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| Bibliography: | XUE Ting, TAN Chaodong, SUN Yongtao （ 1. China University of Petroleum, Beijing 102249, China; 2. CNOOC Oilfield Service Limited, Tianjin 300452, China ） multiple thermal fluid; fluid flow; heat exchange in wellbore;numerical simulation; thermodynamic calculation Aimed at the issues of the small platform space, high operating cost and difficult implementation of conventional thermal producing in offshore oil field, the multiple thermal fluid huff and puff technique was researched. The mathematical mod- els for multiple thermal fluid flow and heat exchange in wellbore during the injection were established on the basis of two phase flow theory and heat transfer principle. The flow features and heat exchange rules of the mixture in wellbore were analyzed, and the effects of injection pressure and temperature on the pressure, temperature and steam quality of the mixture in the wellbore were discussed. The effect of different proportion of multiple thermal fluids on the temperature of the mixture flow was also discu |
| ISSN: | 1000-7393 |